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DOI10.1175/JCLI-D-16-0393.1
Monsoon Gyres of the Northwest Pacific: Influences of ENSO, the MJO, and the Pacific-Japan Pattern
Molinari, John; Vollaro, David
2017-03-01
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2017
卷号30期号:5
文章类型Article
语种英语
国家USA
英文摘要

An objective definition of monsoon gyres in the northwest Pacific was developed in order to construct a gyre climatology. Over a 31- yr period, 53 gyres were identified with a median formation location at 16.5 degrees N, 135 degrees E. More than 80% formed during July-September. More than half of gyres developed during El Nino periods at a median location 1200 km farther to the east-southeast than during La Nina. Cyclonic winds at 850 hPa extended across a diameter of more than 4000 km, with maximum tangential wind near the 1000-km radius. A precipitation maximum extended westward for several thousand kilometers south of the gyre. Typhoons were most common north and east of the gyre centers. More than 70% of gyres developed during large-amplitude MJO events, with a strong preference for Real-time Multivariate MJO ( RMM) phases 5-7. In boreal summer these phases contain circulation and convective anomalies that coincide most closely with those of the climatological monsoon trough. Gyres are most likely to form when an active, large-amplitude MJO event superposes with the monsoon trough in the presence of high sea surface temperature. Gyres exhibited 850hPa wind, height, and vorticity anomalies and surface latent heat flux anomalies that closely resembled the active Pacific-Japan pattern ( PJP). This was especially true during La Nina, even though no attempt was made to isolate the PJP. It is hypothesized that an active MJO modulates gyre formation, and the gyres project onto the active phase of the PJP as they move westward.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000395539100013
WOS关键词TROPICAL CYCLONE FORMATION ; WESTERN PACIFIC ; TELECONNECTION PATTERN ; SUMMER CIRCULATION ; CYCLOGENESIS ; OSCILLATION ; VARIABILITY ; IMPACT
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/20786
专题气候变化
作者单位SUNY Albany, Dept Atmospher & Environm Sci, Albany, NY 12222 USA
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GB/T 7714
Molinari, John,Vollaro, David. Monsoon Gyres of the Northwest Pacific: Influences of ENSO, the MJO, and the Pacific-Japan Pattern[J]. JOURNAL OF CLIMATE,2017,30(5).
APA Molinari, John,&Vollaro, David.(2017).Monsoon Gyres of the Northwest Pacific: Influences of ENSO, the MJO, and the Pacific-Japan Pattern.JOURNAL OF CLIMATE,30(5).
MLA Molinari, John,et al."Monsoon Gyres of the Northwest Pacific: Influences of ENSO, the MJO, and the Pacific-Japan Pattern".JOURNAL OF CLIMATE 30.5(2017).
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